28799100 has 108 divisors (see below), whose sum is σ = 98509320. Its totient is φ = 6979200.

The previous prime is 28799083. The next prime is 28799101. The reversal of 28799100 is 199782.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28799101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8446 + ... + 11354.

Almost surely, 2^28799100 is an apocalyptic number.

28799100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28799100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49254660).

28799100 is an abundant number, since it is smaller than the sum of its proper divisors (69710220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28799100 is a wasteful number, since it uses less digits than its factorization.

28799100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940 (or 2930 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 28799100 is about 5366.4792927952. The cubic root of 28799100 is about 306.5205799682.

The spelling of 28799100 in words is "twenty-eight million, seven hundred ninety-nine thousand, one hundred".